hI there I recently purchased 4 green tigerbarbs to add to my school of 6 normal tigerbarbs..unfortunatly 1 died in less than 24 hours and another died after about 30 hours. ..they were ok until I woke the next morning to find one trying to swim but he couldnt,he was just getting pushed around in the tanks current on the surface..somtimes upsidedown..I think this is swim bladder disease..anyway he died very quickly,iput him in a fry container inside the tank to isolate him from the other fishies just in case he wasn't actually dead..I went to work ,came home and he was definitely dead..( turned pure white).and another of my new green tigerbarbs was doing the same thing. .again isolation..the 2 remaining green barbs seem fine..for now..I was just wondering if this is a contageous disease as I don't want to wipe out my whole tank, i`ll be devistated if that happens..also should swim bladder disease kill them so quick..there is no fin nipping going on and all there fins were untouched,they just couldnt swim 10 minutes later dead.. > ...other than that there is no visable symptoms.very worried also what medication can be used to treat swim bladder disease? ??? ?..if that is what they have? please help?